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Realization of a multichannel integrated Young interferometer chemical sensor.
Aurel Ymeti1, Johannes S Kanger, Jan Greve
1University of Twente, PO Box 217,7500 AE Enschede, The Netherlands. A.Ymeti@utwente.nl
Applied Optics
|October 8, 2003
Summary
This study presents a novel four-channel optical interferometer for simultaneously monitoring three binding processes. The device achieves high refractive-index resolution, demonstrating its potential for multipurposed sensing applications.
Area of Science:
- Optical Engineering
- Biomedical Sensing
- Interferometry
Background:
- Integrated optical devices offer miniaturization and enhanced sensitivity for real-time monitoring.
- Young's interferometers are sensitive to phase shifts, making them suitable for detecting refractive index changes.
Purpose of the Study:
- To design, realize, and characterize a four-channel integrated optical Young interferometer.
- To enable simultaneous and independent monitoring of multiple binding processes.
- To assess the device's performance in detecting varying glucose concentrations.
Main Methods:
- Fabrication of a four-channel integrated optical Young interferometer.
- Recording interference patterns using a CCD camera.
- Analysis of interference patterns via a fast-Fourier-transform algorithm.
- Theoretical analysis and experimental validation with glucose solutions.
Main Results:
- Simultaneous monitoring of three independent binding processes was achieved.
- The device demonstrated a phase resolution of approximately 1 x 10(-4) fringes.
- A refractive-index resolution of approximately 8.5 x 10(-8) was obtained.
- Measured sensitivity coefficients closely matched theoretical calculations.
Conclusions:
- The developed four-channel interferometer is a versatile tool for multipurposed sensing.
- The device exhibits high sensitivity and resolution for refractive index measurements.
- Error reduction schemes were successfully implemented to improve accuracy.